Multi-domain liquid crystal display device

ABSTRACT

A multi-domain liquid crystal display device includes first and second substrates facing each other and a liquid crystal layer between the first and second substrates. A conductive layer distorting electric field is on the first substrate, and a common-auxiliary electrode is on a same layer whereon the conductive layer distorting electric field is formed. A common electrode is on the second substrate, and a storage electrode is in an electric field inducing region that divides the liquid crystal layer into at least two domains.

BACKGROUND OF THE INVENTION

[0001] 1. Field of the Invention

[0002] The present invention relates to a liquid crystal display device(LCD), and more particularly, to a liquid crystal display device havingcommon-auxiliary electrodes surrounding pixel region and storageelectrode in the pixel region.

[0003] 2. Description of the Related Art

[0004] Recently, an LCD has been proposed where the liquid crystal isnot aligned and the liquid crystal is driven by side electrodesinsulated from pixel electrodes. FIGS. 1a and 1 b are sectional views ofpixel unit of the conventional LCDs.

[0005] Regarding conventional LCDs, a plurality of gate bus linesarranged in a first direction on a first substrate and a plurality ofdata bus lines arranged in a second direction on the first substratedivide the first substrate into a plurality of pixel regions.

[0006] A thin film transistor (TFT) applies image signal delivered fromthe data bus line to a pixel electrode 13 on a passivation layer 37. TheTFT is formed on each pixel region and comprises a gate electrode, agate insulator, a semiconductor layer, a source electrode, and a drainelectrode, etc.

[0007] Pixel electrode 13 is formed on the gate insulator, thereonpassivation layer 37 is formed over the whole first substrate, and sideelectrode 21 is formed surrounding the pixel electrode 13 and a part ofpixel electrode 13 overlaps side electrode 21. (FIG. 1A)

[0008] Alternatively, pixel electrode 13 is formed on the gateinsulator, and passivation layer 37 is formed over the whole firstsubstrate.

[0009] On second substrate, a light shielding layer is formed to shieldany light leakage from gate and data bus lines, and the TFT, a colorfilter layer is formed on the light shielding layer, an over coat layeris formed on the color filter layer, a common electrode 17 is formed tohave open area 27 on the over coat layer, and a liquid crystal layer isformed between the first and second substrates.

[0010] The common electrode 17 is formed and applies electric field to aliquid crystal layer together with pixel electrode 13. Side electrode 21and open area (slit) 27 distort the electric field applied to the liquidcrystal layer.

[0011] Then, in a unit pixel liquid crystal molecules are drivenvariously. This means that when voltage is applied to the LCD,dielectric energy due to the distorted electric field arranges theliquid crystal directors in needed or desired positions.

[0012] In the LCDs, however, open area 27 in common electrode 17 orpixel electrode 13 is necessary, and the liquid crystal molecules couldbe driven stably when the open area is wider. If the electrodes do nothave an open area or the width of the open area is narrow, the electricfield distortion needed to divide the pixel region becomes weak. Then,when voltage over a threshold voltage, V_(th), is applied, the timeneeded to stabilize the liquid crystal directors increases.

[0013] At this time, disclination occurs from the area where the liquidcrystal directors are parallel with a transmittance axis of thepolarizer, which results in a decrease in brightness. Further, accordingto the surface state of LCDs, the liquid crystal texture has anirregular structure.

SUMMARY OF THE INVENTION

[0014] Accordingly, the present invention is directed to an LCD thatsubstantially obviates one or more problems due to limitations anddisadvantages of the related art.

[0015] An object of the present invention is to provide a multi-domainLCD having high response time characteristics and high brightness bystable arrangement of liquid crystal molecules.

[0016] Additional features and advantages of the invention will be setforth in the description which follows, and in part will be apparentfrom the description, or may be learned by practice of the invention.The objectives and other advantages of the invention will be realizedand attained by the structure particularly pointed out in the writtendescription and claims hereof as well as the appended drawings.

[0017] To achieve the objects and in accordance with the purpose of theinvention, as embodied and broadly described herein, a multi-domainliquid crystal display device comprises first and second substratesfacing each other; a conductive layer distorting electric field on thefirst substrate; a common-auxiliary electrode on a same layer whereonthe conductive layer distorting electric field is formed; a commonelectrode on the second substrate; a liquid crystal layer between thefirst and second substrates; and a storage electrode in an electricfield inducing region that divides the liquid crystal layer into atleast two domains.

[0018] The liquid crystal layer includes liquid crystal molecules havingpositive or negative dielectric anisotropy.

[0019] The multi-domain liquid crystal display device further comprisesa negative uniaxial or negative biaxial film on at least one substrate.

[0020] The liquid crystal layer includes chiral dopants.

[0021] It is to be understood that both the foregoing generaldescription and the following detailed description are exemplary andexplanatory and are intended to provide further explanation of theinvention as claimed.

BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings, which are included to provide afurther understanding of the invention and are incorporated in andconstitute a part of the specification, illustrates embodiments of theinvention and together with description serve to explain the principlesof the invention.

[0023] In the drawings:

[0024]FIGS. 1A and 1B are sectional views of the liquid crystal displaydevices in the related art;

[0025]FIGS. 2A, 2B, 2C, 2D, 2E, 2F, and 2G are plan views of themulti-domain liquid crystal display device according to the firstembodiment of the present invention, and FIGS. 2H, 2I, and 2J, 2K aresectional views taken along the lines I-I′ of FIG. 2A;

[0026]FIGS. 3A, 3B, 3C, 3D, 3E, 3F, and 3G are plan views of themulti-domain liquid crystal display device according to the secondembodiment of the present invention, and FIGS. 3H, and 3I, 3J aresectional views taken along the lines II-II′ of FIG. 3A;

[0027]FIGS. 4A, 4B, 4C, 4D, 4E, 4F, and 4G are plan views of themulti-domain liquid crystal display devices according to the thirdembodiment of the present invention, and FIGS. 4H, and 4I, 4J aresectional views taken along the lines III-III′ of FIG. 4A;

[0028]FIGS. 5A, 5B, 5C, 5D, 5E, 5F, and 5G are plan views of themulti-domain liquid crystal display devices showing various electricfield inducing window or dielectric frame according to the embodimentsof the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0029] Hereinafter, the multi-domain liquid crystal display device ofthe present invention is explained in detail by accompanying thedrawings.

[0030]FIGS. 2A, 2B, 2C, 2D, 2E, 2F, and 2G are plan views of themulti-domain liquid crystal display device according to the firstembodiment of the present invention, FIGS. 2H, 2I are sectional viewstaken along the lines I-I′ of FIG. 2A, and FIGS. 2J, 2K are entiresectional views according to the FIG. 2H.

[0031] As shown in the figures, the present invention comprises firstand second substrates 31, 33, a plurality of gate bus lines 1 arrangedin a first direction on the first substrate and a plurality of data buslines 3 arranged in a second direction on the first substrate, a TFT, apassivation layer 37, a pixel electrode 13, and a common-auxiliaryelectrode 15.

[0032] Data bus lines 3 and gate bus lines 1 divide the first substrate31 into a plurality of pixel regions. The common-auxiliary electrode 15distorts electric field on a same layer whereon the pixel electrode 13is formed. The TFT is formed on each pixel region and comprises a gateelectrode 11, a gate insulator 35, a semiconductor layer, an ohmiccontact layer, and source/drain electrodes 7, 9.

[0033] Passivation layer 37 is formed on the whole first substrate 31.Pixel electrode 13 is coupled to the drain electrode 9 by a contact hole39.

[0034] On the second substrate 33, a light shielding layer 25 is formedto shield the light leaked from gate and data bus lines 1, 3, and theTFT, a color filter layer 23 is formed on the light-shielding layer 25,a common electrode 17 is formed on the color filter layer 23 andelectrically connects to the common-auxiliary electrode 15, and a liquidcrystal layer is formed between the first and second substrates 31, 33.

[0035] The common electrode 17 has dielectric frames 53 thereon, or haselectric field inducing window 51 like hole or slit in its inner part.

[0036] In the first embodiment of the present invention, a first storageelectrode 43 is formed on a same layer whereon the gate bus line isformed (refer to the FIG. 2I), or on a same layer whereon thesource/drain electrodes 7, 9 are formed (refer to the FIG. 2H), and thenthe first storage electrode 43 forms a storage capacitor 41 with thepixel electrode 13. At this time, since the first storage electrode 43is patterned as shown in the figures, the portions of disclination inthe pixel region are covered.

[0037] Further, as shown in the FIG. 2C, a third storage electrode 65 isadditionally formed to enlarge the capacitance of liquid crystal displaydevice on the gate bus line 1, so that a image flicker or a residualimage could be removed.

[0038] In the FIGS. 2D, 2E, 2F, and 2G, the first storage electrode 43are patterned horizontally, vertically, and/or diagonally, or in a shapeof “+” or “×”, and in these embodiments, the dielectric frame 53 orelectric field inducing window 51 on the second substrate is patternedas above.

[0039] In the FIGS. 2J and 2K, the common electrode 17 has dielectricframes 53 thereon, and has electric field inducing window 51 like holeor slit therein.

[0040]FIGS. 3A, 3B, 3C, 3D, 3E, 3F, and 3G are plan views of themulti-domain liquid crystal display device according to the secondembodiment of the present invention, FIG. 3H is sectional view takenalong the lines II-II′ of FIG. 3A, and FIGS. 3I, 3J are entire sectionalviews according to the FIG. 3H.

[0041] As shown in the figures, the present invention comprises firstand second substrates 31, 33, a plurality of gate bus lines 1 arrangedin a first direction on the first substrate 31 and a plurality of databus lines 3 arranged in a second direction on the first substrate 31, acommon-auxiliary electrode 15, a first storage electrode 43, a TFT, apassivation layer 37, and a pixel electrode 13.

[0042] Data bus lines 3 and gate bus lines 1 divide the first substrate31 into a plurality of pixel regions. The first storage electrode 43 isin the pixel region and on a same layer whereon the gate bus line 1 isformed, and is connected to or independently formed with thecommon-auxiliary electrode 15 to make a storage capacitor with the pixelelectrode 13.

[0043] The common-auxiliary electrode 15 surrounds the pixel region anddistorts electric field on a same layer whereon the gate bus line isformed.

[0044] The TFT is formed on each pixel region and comprises a gateelectrode 11, a gate insulator 35, a semiconductor layer, an ohmiccontact layer, and source/drain electrodes 7, 9. Passivation layer 37 isformed on the whole first substrate 31. Pixel electrode 13 is coupled tothe drain electrode 9 by a contact hole 39.

[0045] On the second substrate 33, a light shielding layer 25 is formedto shield the light leaked from gate and data bus lines 1, 3, and theTFT, a color filter layer 23 is formed on the light shielding layer 25,a common electrode 17 is formed on the color filter layer 23 andelectrically connects to the common-auxiliary electrode 15, and a liquidcrystal layer is formed between the first and second substrates 31, 33.

[0046] The common electrode 17 has dielectric frames 53 thereon, or haselectric field inducing window 51 like hole or slit in its inner part.

[0047] Further, as shown in the FIG. 3B, a third storage electrode 65 isadditionally formed to enlarge the capacitance of liquid crystal displaydevice on the gate bus line 1, so that a image flicker or a residualimage could be removed.

[0048] In the FIG. 3C, all ends of the first storage electrode 43 areconnected to the common-auxiliary electrode 15 and the third storageelectrode 65 is formed on the common-auxiliary electrode 15 as well asthe gate bus line 1, which obtains more enlarged capacitance than thatin the embodiment in the FIG. 3B.

[0049] In the FIGS. 3D, 3E, 3F, and 3G, the first storage electrode 43are patterned horizontally, vertically, and/or diagonally, or in a shapeof “+” or “×”, and in these embodiments, the dielectric frame 53 orelectric field inducing window 51 on the second substrate is patternedas above. At this time, since the first storage electrode 43 ispatterned as shown in the figures, the portions of disclination in thepixel region are covered.

[0050] In the FIGS. 3I and 3J, the common electrode 17 has dielectricframes 53 thereon, and has electric field inducing window 51 like holeor slit therein.

[0051]FIGS. 4A, 4B, 4C, 4D, 4E, 4F, and 4G are plan views of themulti-domain liquid crystal display device according to the secondembodiment of the present invention, FIG. 4H is sectional view takenalong the lines III-III′ of FIG. 4A, and FIGS. 4I, 4J are entiresectional views according to the FIG. 4H.

[0052] In the third embodiment, a second storage electrode 63 isadditionally formed on a same layer whereon the data bus line 3 isformed to the structure in the second embodiment. The second storageelectrode 63 is formed at a time when the source/drain electrodes 7, 9are formed and have a shape like the first storage electrode 43 in thepixel region.

[0053] When the second storage electrode 63 is connected to the drainelectrode 9, the same voltage with the pixel electrode is applied to thesecond storage electrode, and then the second storage electrode forms astorage capacitor with the first storage electrode 43 related to thecommon-auxiliary electrode 15. When the second storage electrode 63 isindependently formed, this forms a storage capacitor with the pixelelectrode 13 and the first storage electrode 43.

[0054] Further, as shown in the FIG. 4B, a third storage electrode 65 isadditionally formed to enlarge the capacitance of liquid crystal displaydevice on the gate bus line 1, so that a image flicker or a residualimage could be removed.

[0055] In the FIG. 4C, all ends of the first storage electrode 43 areconnected to the common-auxiliary electrode 15 and the third storageelectrode 65 is formed on the common-auxiliary electrode 15 as well asthe gate bus line 1, which obtains more enlarged capacitance than thatin the embodiment in the FIG. 4B.

[0056] In the FIGS. 4D, 4E, 4F, and 4G, the first storage electrode 43are patterned horizontally, vertically, and/or diagonally, or in a shapeof “+” or “×”, and in these embodiments, the dielectric frame 53 orelectric field inducing window 51 on the second substrate is patternedalso as above. At this time, since the first storage electrode 43 ispatterned as shown in the figures, the portions of disclination in thepixel region are covered.

[0057] In the FIGS. 4I and 4J, the common electrode 17 has dielectricframes 53 thereon, and has electric field inducing window 51 like holeor slit therein.

[0058] To manufacture the multi-domain LCD of the present invention, ineach pixel region on the first substrate 31, a TFT is formed comprisinggate electrode 11, gate insulator 35, semiconductor layer, ohmic contactlayer and source/drain electrodes 7, 9. At this time, a plurality ofgate bus lines 1 and a plurality of data bus lines 3 are formed todivide the first substrate 31 into a plurality of pixel regions.

[0059] Gate electrode 11 and gate bus line 1 are formed by sputteringand patterning a metal such as Al, Mo, Cr, Ta, or Al alloy, etc.Alternatively, it is possible to form the gate electrode and gate busline as a double layer, the double layer is formed from differentmaterials.

[0060] At this time, common-auxiliary electrode 15 is formed surroundingthe pixel region. And, the first storage electrode 43 is formed bysputtering and patterning a metal such as ITO, Al, or Cr in the pixelregion. The gate insulator 35 is formed by depositing SiN_(X), SiO_(X),or BCB (BenzoCycloButene), acrylic resin using PECVD thereon.

[0061] The semiconductor layer and the ohmic contact layer are formed bydepositing with PECVD(Plasma Enhanced Chemical Vapor Deposition), andpatterning amorphous silicon (a-Si) and doped amorphous silicon (n⁺a-Si), respectively. Also, gate insulator 35, amorphous silicon (a-Si),and doped amorphous silicon (n⁺ a-Si) could be formed by PECVD andpatterned simultaneously.

[0062] Data bus line 3 and source/drain electrodes 7, 9 are formed bysputtering and patterning a metal such as Al, Mo, Cr, Ta, or Al alloy,etc. Alternatively, it is possible to form the data bus line andsource/drain electrodes as a double layer, the double layer is formedfrom different materials.

[0063] At this time, A storage electrode is additionally formed in thepixel region, on the gate bus line 1 and/or common-auxiliary electrode15 at the same time, the storage electrode makes a storage capacitorwith gate bus line 1 and/or common-auxiliary electrode 15.

[0064] Subsequently, passivation layer 37 is formed with BCB(BenzoCycloButene), acrylic resin, polyimide based material, SiN_(X) orSiO_(X) on the whole first substrate 31. Pixel electrode 13 is formed bysputtering and patterning a metal such as ITO(indium tin oxide). Acontact hole 39 is formed to connect the pixel electrode 13 to the drainand storage electrodes by opening and patterning a part of thepassivation layer 37 on the drain electrode.

[0065] When common-auxiliary electrode 15, and gate bus line 1 or pixelelectrode 13 are formed with the same material, the common-auxiliary andgate electrodes are simultaneously formed with one mask and connectedelectrically to common electrode 17, or it is possible to form them withdifferent materials or double layer with additional masks.

[0066] On the second substrate 33, a light shielding layer 25 is formedto shield any light leakage from gate and data bus lines 1, 3, the TFT,and common-auxiliary electrode 15. A color filter layer 23 is formed R,G, B (red, green, blue) elements to alternate on the light shieldinglayer 25.

[0067] A common electrode 17 is formed with ITO on the color filterlayer 23, and a liquid crystal layer is formed by injecting liquidcrystal between the first and second substrates 31, 33. The liquidcrystal layer may include liquid crystal molecules having positive ornegative dielectric anisotropy. Also, the liquid crystal layer mayinclude chiral dopants.

[0068] On the common electrode 17, dielectric frames 53 are formed bydepositing photosensitive material and patterning in various shapesusing photolithography. The dielectric frame 53 includes material ofwhich dielectric constant is same or smaller than that of the liquidcrystal, and the dielectric constant thereof is preferably below 3, forexample, photoacrylate or BCB (BenzoCycloButene).

[0069] Furthermore, the dielectric frame 53 is formed on at least onesubstrate between the first and second substrates.

[0070] Alternatively, an electric field inducing window 51 is formed onat least one substrate between the first and second substrates 31, 33.At this time, the dielectric frame 53 and electric field inducing windoware formed on same substrate together. The electric field inducingwindow 51 is formed by patterning hole or slit in the common electrode17 or pixel electrode 13.

[0071] To apply voltage (V_(com)) to common-auxiliary electrode 15,Ag-dotting part is formed in each corner of driving area on the firstsubstrate 31, electric field is applied with the second substrate 33,and the liquid crystal molecules are driven by the potential difference.A voltage (V_(com)) is applied to common-auxiliary electrode 15 byconnecting the Ag-dotting part to the common-auxiliary electrode 15,which is accomplished simultaneously by forming the common-auxiliaryelectrode 15.

[0072] On at least one substrate, a compensation film 29 is formed withpolymer. The compensation film 29 is a negative uniaxial film, which hasone optical axis, and compensates the phase difference of the directionaccording to viewing-angle. Hence, it is possible to compensateeffectively the right-left viewing-angle by widening the area withoutgray inversion, increasing contrast ratio in an inclined direction, andforming one pixel to multi-domain.

[0073] In the present multi-domain liquid crystal display device, it ispossible to form a negative biaxial film as the compensation film, whichhas two optical axes and wider viewing-angle characteristics as comparedwith the negative uniaxial film. The compensation film could be formedon both substrates or on one of them.

[0074] After forming the compensation film, polarizer is formed on atleast one substrate. At this time, the polarization axis of thepolarizer is 45°, 135° against the alignment axis of the liquid crystalmolecules, and the compensation film and polarizer are preferablycomposed as one. Also, it is possible to form that the optic axis of thecompensation film and the polarization axis of the polarizer areparallel.

[0075] In the multi-domain LCD of the present invention, the apertureratio is enhanced by an optimum structure design of a “n-line” thin filmtransistor (U.S. Pat. No. 5,694,185) so as to reduce power consumption,increase luminance, and lower reflection, thus improving contrast ratio.

[0076] Aperture ratio is increased by forming the TFT above the gateline and providing a “n-line” TFT. The parasitic capacitor, occurringbetween the gate bus line and the drain electrode, can be reduced when aTFT having the same channel length as the symmetrical TFT structure ismanufactured due to effect of channel length extension.

[0077]FIGS. 5A, 5B, 5C, 5D, 5E, 5F, and 5G are plan views of themulti-domain liquid crystal display devices showing various electricfield inducing window or dielectric frame according to the embodimentsof the present invention.

[0078] The multi-domain LCD of the present invention has a dielectricframe 53 on the pixel electrode 13, common electrode, and/or colorfilter layer 23, or an electric field inducing window 51 like a hole orslit in the pixel electrode 13, passivation layer 37, gate insulator 35,color filter layer 23, and/or common electrode by patterning, therebyelectric field distortion effect and multi-domain are obtained.

[0079] That is, from forming electric field inducing window 51 ordielectric frame 53, the multi-domain is obtained by dividing each pixelinto four domains such as in a “+”, “×”, or “double Y” shape, ordividing each pixel horizontally, vertically, and/or diagonally, anddifferently alignment-treating or forming alignment directions on eachdomain and on each substrate.

[0080] In multi-domain LCD of the present invention, an alignmentlayer(not shown in the figure) is formed over the whole first and/orsecond substrates. The alignment layer includes a material such aspolyamide or polyimide based materials, PVA (polyvinylalcohol), polyamicacid or SiO₂. When rubbing is used to determine an alignment direction,it should be possible to apply any material suitable for the rubbingtreatment.

[0081] Moreover, it is possible to form the alignment layer with aphotosensitive material such as PVCN (polyvinylcinnamate), PSCN(polysiloxanecinnamate), and CelCN (cellulosecinnamate) based materials.Any material suitable for the photo-aligning treatment may be used.

[0082] Irradiating light once on the alignment layer determines thealignment or pretilt direction and the pretilt angle.

[0083] The light used in the photo-alignment is preferably a light in arange of ultraviolet light, and any of unpolarized light, linearlypolarized light, and partially polarized light can be used.

[0084] In the photo-alignment treatment, it is possible to apply one orboth of the first and second substrates, and to apply differentaligning-treatment on each substrate.

[0085] From the aligning-treatment, a multi-domain LCD is formed with atleast two domains, and LC molecules of the LC layer are aligneddifferently one another on each domain. That is, the multi-domain isobtained by dividing each pixel into four domains such as in a “+” or“×” shape, or dividing each pixel horizontally, vertically, and/ordiagonally, and differently alignment-treating or forming alignmentdirections on each domain and on each substrate.

[0086] It is possible to have at least one domain of the divided domainsunaligned. It is also possible to have all domains unaligned.

[0087] Consequently, since the multi-domain LCD of the present inventionforms the common-auxiliary electrode surrounding the pixel region andthe storage electrode on a same layer whereon the gate bus line and/orthe data bus line in the pixel region, it improves the aperture ratioand storage capacitor, which obtains wide viewing angle and multi-domaineffect.

[0088] Moreover, when the common-auxiliary electrode is on a same layerwith the gate bus line, the short between the pixel and common-auxiliaryelectrodes is removed, and then the yield is improved.

[0089] It will be apparent to those skilled in the art that variousmodifications can be made in the liquid crystal display device of thepresent invention without departing from the sprit or scope of theinvention. Thus, it is intended that the present invention covers themodifications and variations of this invention provided they come withinthe scope of the appended claims and their equivalents.

What is claimed is:
 1. A multi-domain liquid crystal display devicecomprising: first and second substrates facing each other; a conductivelayer distorting electric field on said first substrate; acommon-auxiliary electrode on a same layer whereon said conductive layerdistorting electric field is formed; a common electrode on said secondsubstrate; a liquid crystal layer between said first and secondsubstrates; and a storage electrode in an electric field inducing regionthat divides said liquid crystal layer into at least two domains.
 2. Themulti-domain liquid crystal display device according to claim 1, furthercomprising: a pixel electrode on said conductive layer distortingelectric field.
 3. The multi-domain liquid crystal display deviceaccording to claim 1, wherein said conductive layer distorting electricfield is gate bus line.
 4. The multi-domain liquid crystal displaydevice according to claim 3, wherein said gate bus line is formed on asame layer whereon said storage electrode is formed.
 5. The multi-domainliquid crystal display device according to claim 4, further comprising:a supplementary storage electrode on said storage electrode to form astorage capacitor.
 6. The multi-domain liquid crystal display deviceaccording to claim 5, wherein said supplementary storage electrode issource and drain electrodes.
 7. The multi-domain liquid crystal displaydevice according to claim 4, further comprising: a supplementary storageelectrode on said gate bus line and/or said common-auxiliary electrode.8. The multi-domain liquid crystal display device according to claim 4,wherein said storage electrode is electrically connected to saidcommon-auxiliary electrode.
 9. The multi-domain liquid crystal displaydevice according to claim 1, wherein said conductive layer distortingelectric field is source and drain electrodes.
 10. The multi-domainliquid crystal display device according to claim 9, wherein said sourceand drain electrodes are formed on a same layer whereon said storageelectrode is formed.
 11. The multi-domain liquid crystal display deviceaccording to claim 2, wherein said pixel electrode overlaps saidcommon-auxiliary electrode.
 12. The multi-domain liquid crystal displaydevice according to claim 2, wherein said pixel electrode is notoverlapping said common-auxiliary electrode.
 13. The multi-domain liquidcrystal display device according to claim 1, wherein said storageelectrode is a light shielding layer.
 14. The multi-domain liquidcrystal display device according to claim 1, wherein said electric fieldinducing region is an electric field inducing window in said commonelectrode.
 15. The multi-domain liquid crystal display device accordingto claim 1, wherein said electric field inducing region is a dielectricframe on said common electrode.
 16. The multi-domain liquid crystaldisplay device according to claim 2, wherein said electric fieldinducing region is an electric field inducing window in said pixelelectrode.
 17. The multi-domain liquid crystal display device accordingto claim 2, wherein said electric field inducing region is a dielectricframe on said pixel electrode.
 18. The multi-domain liquid crystaldisplay device according to claim 1, wherein said common-auxiliaryelectrode includes a material selected from the group consisting of ITO(indium tin oxide), aluminum, molybdenum, chromium, tantalum, titanium,and an alloy thereof.
 19. The multi-domain liquid crystal display deviceaccording to claim 2, wherein said pixel electrode includes a materialselected from the group consisting of ITO (indium tin oxide), aluminum,and chromium.
 20. The multi-domain liquid crystal display deviceaccording to claim 1, wherein said common electrode includes ITO (indiumtin oxide).
 21. The multi-domain liquid crystal display device accordingto claim 1, further comprising: an alignment layer on at least onesubstrate between said first and second substrates.
 22. The multi-domainliquid crystal display device according to claim 21, wherein saidalignment layer is divided into at least two portions, liquid crystalmolecules in said liquid crystal layer in each portion being aligneddifferently from each other.
 23. The multi-domain liquid crystal displaydevice according to claim 22, wherein at least one portion of said thealignment layer is alignment-treated.
 24. The multi-domain liquidcrystal display device according to claim 22, wherein all portions ofsaid the alignment layer are non-alignment-treated.
 25. The multi-domainliquid crystal display device according to claim 1, wherein said liquidcrystal layer includes liquid crystal molecules having positivedielectric anisotropy.
 26. The multi-domain liquid crystal displaydevice according to claim 1, wherein said liquid crystal layer includesliquid crystal molecules having negative dielectric anisotropy.
 27. Themulti-domain liquid crystal display device according to claim 1, furthercomprising: a negative uniaxial film on at least one substrate betweensaid first and second substrates.
 28. The multi-domain liquid crystaldisplay device according to claim 1, further comprising: a negativebiaxial film on at least one substrate between said first and secondsubstrates.
 29. The multi-domain liquid crystal display device accordingto claim 1, wherein said liquid crystal layer includes chiral dopants.30. A multi-domain liquid crystal display device comprising: first andsecond substrates facing each other; a pixel electrode on said firstsubstrate; a common-auxiliary electrode on a same layer whereon saidpixel electrode is formed; a common electrode on said second substrate;a liquid crystal layer between said first and second substrates; and astorage electrode in an electric field inducing region that divides saidliquid crystal layer into at least two domains.
 31. The multi-domainliquid crystal display device according to claim 30, wherein said pixelelectrode is on said storage electrode.
 32. The multi-domain liquidcrystal display device according to claim 30, wherein said storageelectrode is a light shielding layer.
 33. The multi-domain liquidcrystal display device according to claim 30, further comprising: asupplementary storage electrode in a region other than a region wheresaid pixel electrode is formed.
 34. The multi-domain liquid crystaldisplay device according to claim 30, wherein said electric fieldinducing region is an electric field inducing window in said commonelectrode.
 35. The multi-domain liquid crystal display device accordingto claim 30, wherein said electric field inducing region is a dielectricframe on said common electrode.
 36. The multi-domain liquid crystaldisplay device according to claim 30, wherein said electric fieldinducing region is an electric field inducing window in said pixelelectrode.
 37. The multi-domain liquid crystal display device accordingto claim 30, wherein said electric field inducing region is a dielectricframe on said pixel electrode.
 38. The multi-domain liquid crystaldisplay device according to claim 30, wherein said common-auxiliaryelectrode includes a material selected from the group consisting of ITO(indium tin oxide), aluminum, molybdenum, chromium, tantalum, titanium,and an alloy thereof.
 39. The multi-domain liquid crystal display deviceaccording to claim 30, wherein said pixel electrode includes a materialselected from the group consisting of ITO (indium tin oxide), aluminum,and chromium.
 40. The multi-domain liquid crystal display deviceaccording to claim 30, wherein said common electrode includes ITO(indium tin oxide).
 41. The multi-domain liquid crystal display deviceaccording to claim 30, further comprising: an alignment layer on atleast one substrate between said first and second substrates.
 42. Themulti-domain liquid crystal display device according to claim 41,wherein said alignment layer is divided into at least two portions,liquid crystal molecules in said liquid crystal layer in each portionbeing aligned differently from each other.
 43. The multi-domain liquidcrystal display-device according to claim 42, wherein at least oneportion of said the alignment layer is alignment-treated.
 44. Themulti-domain liquid crystal display device according to claim 42,wherein all portions of said the alignment layer arenon-alignment-treated.
 45. The multi-domain liquid crystal displaydevice according to claim 30, wherein said liquid crystal layer includesliquid crystal molecules having positive dielectric anisotropy.
 46. Themulti-domain liquid crystal display device according to claim 30,wherein said liquid crystal layer includes liquid crystal moleculeshaving negative dielectric anisotropy.
 47. The multi-domain liquidcrystal display device according to claim 30, further comprising: anegative uniaxial film on at least one substrate between said first andsecond substrates.
 48. The multi-domain liquid crystal display deviceaccording to claim 30, further comprising: a negative biaxial film on atleast one substrate between said first and second substrates.
 49. Themulti-domain liquid crystal display device according to claim 30,wherein said liquid crystal layer includes chiral dopants.